/*
 * Copyright (c) 2007 Aleksey Nikiforov
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'Aleksey Nikiforov' nor the names of other contributors 
 *   may be used to endorse or promote products derived from this software 
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.lex.input.effects.component;



public class UnboundSpringModel implements SpringModel {

	private float restPoint;
	private float displacedPoint;
	
	private SpringComponent spring;
	
	public UnboundSpringModel(SpringConfig config) {
		spring = SpringComponent.getForConfig(config);
	}
	
	/**
	 * @see org.lex.input.effects.component.SpringModel#displace(float)
	 */
	public void displace(float distance) {
		displacedPoint += distance;
	}
	
	/**
	 * @see org.lex.input.effects.component.SpringModel#getDisplacement()
	 */
	public float getDisplacement() {
		return displacedPoint - restPoint;
	}
	
	/**
	 * @see org.lex.input.effects.component.SpringModel#setDisplacement(float)
	 */
	public void setDisplacement(float displacement) {
		displacedPoint = restPoint + displacement;
	}
	
	/**
	 * @see org.lex.input.effects.component.SpringModel#stop()
	 */
	public void stop() {
		displacedPoint = restPoint;
		spring.stop();
	}
	
	/**
	 * @see org.lex.input.effects.component.SpringModel#getDisplacedPoint()
	 */
	public float getDisplacedPoint() {
		return displacedPoint;
	}

	/**
	 * @see org.lex.input.effects.component.SpringModel#setDisplacedPoint(float)
	 */
	public void setDisplacedPoint(float displacedPoint) {
		this.displacedPoint = displacedPoint;
	}

	/**
	 * @see org.lex.input.effects.component.SpringModel#getRestPoint()
	 */
	public float getRestPoint() {
		return restPoint;
	}

	/**
	 * @see org.lex.input.effects.component.SpringModel#setRestPoint(float)
	 */
	public void setRestPoint(float restPoint) {
		this.restPoint = restPoint;
	}

	/**
	 * @see org.lex.input.effects.component.SpringModel#update(float)
	 */
	public void update(float deltaT) {
		spring.setDisplacement(displacedPoint - restPoint);
		spring.update(deltaT);
		displacedPoint = restPoint + spring.getDisplacement();
	}

	public float getTravelVector() {
		return spring.getTravelVector();
	}
	
}